At their respective bests, Roberts was definitely the better player. In his first years on Calgary, he played mostly with Nieuwendyk and Loob, then Nieuwendyk and Makarov. On these lines, he usually took a backseat to his linemates. But he deliberately set out to improve his fitness (something which he is famous for today) and became a real force in the NHL in the '92 season, and continued the following season. He was truly one of the best players in the NHL. He had great hockey sense, really good hands, and was very agressive, assertive, and focused.Then his neck injuries started and he was never quite the same again.
Without the injuries, an easy hall of famer.
Roberts tends to get overlooked somewhat, probably because the league was overflowing with talent when he was at his best.